Hinge



MVEZMTOMJ A, W. AHLGREN HINGE Filed April 15, 1960 CAXSI Qf Cmglifem WJan. 2, 1962 Urli This invention relates to a hinge for use insupporting a door on a trarne to swing about a lixed axis between anopened and closed position. More particularly, the invention relates tobutt type hinges having two leaves which include door and frame mountingportions projecting inwardly from the plane of the door to lie along theedges of the door and the frame and knuckle portions disposed outwardlyof the plane of the door and joined together by a pivot pin, the doorwhen mounted being flush with the frame.

The primary object of the invention is to `provide a hinge of the abovecharacter having a pivot pin constructed in a novel manner so as toprevent the hanging of articles such as clothes, aprons and the like onthe head of the pin.

A more detailed object is to shape the head so as to present a smoothoutward contour and, at the same time, to project inwardly between thedoor and the frame to prevent articles from passing behind the head.

Other objects and advantages of the invention will become apparent fromthe following detailed description taken in connection with theaccompanying drawings, in which FIGURE l is a fragmentary perspectiveview of a door supported on a frame by a hinge embodying the novelfeatures of the present invention.

FIG. 2 is a plan View of the hinge.

FIG. 3 is a sectional view taken along line 3-3 in FIG. 2.

FIG. 4 is a perspective View or" `a hinge pin.

FIG. 5 is a perspective View of a bearing.

For purposes of illustration, the present invention is shown in thedrawings embodied in a hinge for use in mounting a door 11 on a frame 12to turn about a vertical axis between an open and closed position. Theillustrated hinge 1l) is of a type commonly known as a butt hinge and isutilized to mount a hush type door, that is, a door which, when closed,lies in the same plane as the frame. Such hinges include two leaves orwings, a frame leaf 13 and a door leaf 14, both of which extend inwardlybetween the edges of the door 1l and the frame 12. and which are pinnedtogether to turn relative to each other about a vertical aXis.

The leaves 13 and 14 include flat portions 15 which lie along the edgeof the door 11 and of the frame 12 respectively and are secured to thesemembers as by screws 16. ln order to join the leaves 13 and 14 together,interfitting knuckles 17 and 18 are formed on one edge of the llatportions 15, the door leaf having a single knuckle 18 located betweenand in line with a pair of spaced knuckles 17 on the frame leaf (FIG.3). The

hinge is mounted by inserting the flat portions 1S between the edges ofthe door 11 and the frame 12 with the outer periphery of the knuckles 17and 18 adjacent the outer face of the door and the frame. When the hinge10 is used with a door and frame of hollow, box-like sheet metalconstruction as illustrated on the drawings, the flat portions 15project through slots 19 formed in the face of the door and of the frameand extend along the inner side of the edge of the door and of theframe. The screws 16 are countersunk and extend through the edges andare threaded into the dat portions 15.

The two leaves 13 and 14 are joined together by a pivot pin which isreceived in a bore 21 extending through the knuckles 17 and 18 and whichhas a head Patented dan. 2, 19522 22 on one end to abut the outer end ofthe knuckle 17, Herein, two such pins 20 are utilized, one inserted ineach end of the bore 21. To reduce friction and wear, the surfaces ofthe leaves 13 and 14 which rub together as the door is swung open orclosed are separated by bearings Z3. These bearings 23 comprisecylindrical inserts of a suitable bearing material such as nylon and areadapted to be received in the bore Z1 in the knuckle 13 on the door leaf14. A radial flange 21.1 integrai with one end of the bearing extendsacross the end of the knuckle 18 to separate it from the spaced knuckles17 on the frame leaf. Two such inserts are used, one inserted in eachend of the bore '21 in the knuckle 1d and each having an inside diameteradapted to receive the pivot pin 2G.

A problem with the type hinge described above encountered especially ininstitutions such as dormitories, schools, hospitals and the like isthat the headed pins of the hinges become catchalls on which variousarticles such as clothes and aprons are hung. The present inventioncontemplates a novel construction of the hinge pins E@ which results ina smooth outer contour presenting surface which is unable to supportsuch articles. To this end, the head 22 of the pin 2) is curved towardthe plane of the door 11 and a portion of the head extends into thecrack between the door and the frame 12 to prevent hooking articlesbehind the head.

ln the present instance, the head 22 of the pin Ml has a shoulder 25adapted to abut the end or the knuckle 17 and having an outer diameterequal to the outer diameter of the knuckle. The head Z2 is inclinedinwardly away from the outer periphery of the shoulder 25 and convexlycurved toward the plane of the door 11 in a somewhat bullet-like shapeand terminates in a straight side parallel to the plane oi the door andgenerally in line with the outer periphery of the knuckles 17 and 13.Thus, in cross section, the head 22 is substantially in the form of aquarter circle having two straight sides perpendicular to each other andjoined by a curved side. One of the straight sides lies in a verticalplane coincident with the plane of the frame and the other lies in ahori- Zontal plane delined by the end of the knuckle To prevent thehanging or' articles on the hinge by hooking a portion of them behindthe head 22 between the face of the door and frame and the head, a ridge26 is formed `along the vertical straight side of the head to extendlaterally therefrom in the same direction and parallel to the l'latportion 15 on the frame leaf 13. The ridge 26 projects inwardly beyondthe face of the frame 12 and into the crack between the door 11 and theframe.

In order to maintain the pin 2G in the desired position as the door 11is opened and closed, means formed on the shank of the pin preventsrelative turning between the latter and the knuckle 17 `formed on thetrarne leaf 13. Herein, this means comprises an enlarged serratedportion 2.7 integral with the pin 2lb and having an outside diameterslightly larger than the inside diameter of the knuckle 17. The serratedportion 27 extends part way through the knuckle 17 when the pin 2h isinserted in the hinge. As the serrated portion 27 is forced into thebore 21 in the knuckle 17, the serraticns `bite into the bore and thusresist turning of the pin relative to the bore.

While only the top pin need be formed as described to accomplish theobjects of the invention, preferably, the lower pin is also so formed.This preserves a symmetrical design and enhances the over-all appearanceof the hinge.

It will be apparent that by the use of a hinge constructed as describedabove the unsightliness of having articles of clothing draped over thehinges on a door can be eliminated. At the same time, the hinge presentsa pleasing appearance in lthat the heads of the pins at either end aregracefully curved from the knuckles into the plane of the door.

claim as my invention:

A hinge for hanging a door on a frame, said hinge having, incombination, a rst leaf member having a at portion adapted to lieagainst the frame and an integral knuckle portion `formed along avertical edge of the at portion, `a second leaf member having a flatportion adapted `to lie against the door and an integral knuckle portionextending along a vertical edge of the fiat portion and interleaved withthe knuckle portion on said rst leaf member, said two knuckle membershaving alined vertical holes, a pin projecting into said holes to joinsaid leaf members and having `a `head abutting against the upper end .ofone of said knuckles, said head having a 15 vertical side disposedsubstantially in the plane of the adjacent vertical edges of said datportions, and a vertical ridge projecting laterally from said side andin between said leaf member, said ridge projecting beyond the adjacentvertical edges of said fiat portions and said head being inclined andcontinuously curved convexly from the upper end of said ridge outwardlyand downwardly to the bottom of the head.

References Cited in the le of this patent UNITED STATES PATENTS 73,120Reiber Jan. 7, 1868 2,719,322 Hager et al Oct. 4, 1955 FOREIGN PATENTS867,503 Germany Feb. 19, 1953

